I downvoted you for your dogmatic insistence on linguistic purity even in unjustifiable corner cases. Females who are 7-17 are not women, they are girls. So what do we call females 7-22? A weighted average (eleven under 18, five 18 and over) would bring it in for "girls," and that's just on the technical basis you're invoking.
But the truth is you don't give a shit about being technically correct (because if you did, you'd go with the weighted average). Instead, you're just hewing to linguistic exactness when it suits you---in this case, when it allows you to save face by "correcting" a poster who kindly and non-confrontationally offered an explanation for why the article title does in fact correctly use the term "girls."
unless you're in your 40s. then 18-22 are still kids ("boys" and "girls"). not legally. but often maturationally (yes, I think I just made that word up).
Often 18-22 year olds are still living at home with parent(s), getting assistance from their parents/family before they strike out on their own.
Yes, legally 'adults', but not necessarily socially so.